I'm definitely a member of the group that likes to archive their own lives, but I can understand why some people would rather "clean house" and throw out old records.
On these shelves and in the three drawers is the RGlasel and Family archive of film photography going back to 1960 and ending in 2011. (My first slides are from 1980, the earliest prints in the albums go back to 1976ish and there are inherited snapshots and professional photographs in the bottom drawer). I don't plan to get rid of any of it, not even the unlabelled negatives in the middle drawer, but that's the kind of person I am. If I selected 20 images of myself to give to my kids, that's probably enough of a heritage to pass on. My Dad has been dead for 25 years, if I kept four or five pictures with him in them, that's enough to preserve his memory for me. My kids were born after he passed away, they have a latent level of curiosity, but realistically a couple pictures of the grandfather they never knew would be enough. As for the hundreds of people in these thousands of images who don't share our genetic material, none of them will have significant meaning to my kids twenty years from now.
When I was on disability for almost all of 2015, I looked at every slide, flipped through every album. In many ways, it was a sobering, almost disturbing experience. What about my best friend from age 6 to 20 that I got an email from out of the blue 10 years ago, but haven't been able to establish real face to face contact with since 1995? What do the pictures of my brothers and sister when they were toddlers have to do with who they are today? It makes me smile when I look at pictures of my wife from 30 years ago, but being reminded of how much our looks have changed since then doesn't affect our relationship today, for good or bad. There is minimal harm in keeping these photographs, but they really aren't relevant to my current life. I can't jump in the DeLorean and alter what happened in the past; if I want to understand why I am who I am today, I have to play the tape of my life in reverse, sequentially reviewing the effects of people and events on my life. I still like being able to look at who I was (actually who I was through the people and places I took pictures of) at an arbitrary point in time, but I'm looking at a ghost.
It's only my life, but I can't accept that the lives of some people are more important than mine, so what applies to my personal situation should apply to society in general. What we see in the past is developed in the context of the present. The only reason to preserve the past is to give us something to frame the present with. Photography is like putting samples of what we see under glass, much like preserving leaves or insects. Photographs don't preserve the living environment that those leaves and insects were a part of before they were collected. Still fun to look at, but not a matter of life or death.